docs: add labels to tutorial
docs: add labels to tutorial

lokik/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,rc/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,RexFuzzle/sfepy,lokik/sfepy,RexFuzzle/sfepy,sfepy/sfepy,BubuLK/sfepy,vlukes/sfepy,RexFuzzle/sfepy,lokik/sfepy,rc/sfepy,sfepy/sfepy,sfepy/sfepy,lokik/sfepy